September 6th to the 28th, created by artist Doug Aitken. This train runs between New York and San Francisco. From TheVerge.com:

“At each of nine stops, a core group of artists will be joined by performers both famous and unknown: Beck, Cat Power, Giorgio Moroder, and more are all set to appear at points across the country. In Chicago, five yurts will separate Union Station into a series of galleries; in Winslow, Arizona, artist Ed Ruscha will make cactus omelets.”

Funny…I read about this back in June on Wired.com. It seems very interesting and genuine. I suppose you’ll be dropping by to check it out when it stops in LA; have fun and take some photos to share, if that’s not much of a trouble.